Leadership Team

Leadership Team

Johnathan Chapman CEO and President

Jonathan ChapmanPresident and Chief Executive Officer

Mr. Chapman joined PTS Diagnostics in March of 2020 after 20+ years of management experience in the medical device industry with ARKRAY USA, Inc. and Medisys. He brings a wealth of knowledge and a successful track record of mergers and acquisitions, post-acquisition integration, global product launches, market identification, and strategic positioning. He is responsible for the overall leadership of PTS Diagnostics and ensuring that the organization continues to deliver on its mission of improving chronic disease management through point-of-care delivery. Mr. Chapman received a Bachelor of Arts from Sheffield University UK, LLM Commercial and Corporate Law from the University of London (SOAS), and LLM Health Law from Hamline Law School, St. Paul, MN. His international experience will serve as a boon to PTS Diagnostics across multiple global markets.

William Benedict Vice President and General Manager

William Benedict – Vice President and General Manager

Mr. Benedict came to PTS Diagnostics in 2006 as Director of Operations and later served as Vice President, Technology and Compliance. He was promoted to his current position of Vice President and General Manager in 2013. While at PTS Diagnostics, he has implemented automation and lean manufacturing practices and instituted continual auditing to maintain the highest levels of compliance. He oversees executive management of PTS Diagnostics’ operations, including manufacturing, quality, IT, clinical, and regulatory. Mr. Benedict is a member of the American Society of Quality, Parenteral Drug Association (PDA), and the Regulatory Affairs Professional Society. He holds a Bachelor of Arts in Biology from Purdue University and a Master of Business Administration from the University of Indianapolis.

Stephen Riendeau Chief Commercial Officer

Stephen Riendeau – Chief Commercial Officer

Mr. Riendeau joined the PTS Diagnostics in 2007 after 17 years of industry-wide sales experience with Specialty Laboratories, Inc., Myriad Genetic Laboratories, Orca Medical Systems, and Abbott Laboratories, Inc. His professional experience prior to PTS Diagnostics included the servicing of individual accounts, territory management, field sales management, and executive direction of corporate accounts. He has overall responsibility for PTS Diagnostics’ global sales in all healthcare segments, sales distribution, and  the development and execution of the company’s strategic sales plan. Mr. Riendeau received a Bachelor of Arts in Economics from Florida State University.


Cliffe Allen – Vice President, U.S. Sales

Mr. Allen joined PTS Diagnostics as Regional Sales Director in October 2015, before being named Vice President, U.S. Sales in July 2016. He has nearly 30 years of experience in diagnostic and consumer healthcare with Glaxo SmithKline, Roche Diagnostics, and Thermo Fisher Scientific. His previous positions primarily focused on leading teams with responsibility for physician, hospital, managed care, and retail partnerships. He is now leading the PTS Diagnostics U.S. sales team in all segments, as well as the development and execution of the company’s strategic plan. Mr. Allen holds a Bachelor of Arts in Accounting from Western Kentucky University.

David Brandt Executive Director of International Sales

David BrandtExecutive Director of International Sales

Mr. Brandt joined PTS Diagnostics in September 2015 and assumed his current role in August of 2019. He has 17 years of in-vitro diagnostic experience working for Nanosphere (now Luminex), Focus Diagnostics (now DiaSorin), and Panbio Diagnostics (now Abbott). His new role supports our international sales team and distribution partners through strategic oversight of regulatory, technical support, marketing, other commercial needs. Mr. Brandt holds a Bachelor of Arts in International Business from Southern Virginia University and Master of Business Administration from the University of Phoenix.


James Anderson Jr., M.D., FACE Medical Director

James “Andy” Anderson, Jr., M.D., FFPM, FACE – Medical Director

Dr. Anderson trained in Internal Medicine and specializes in Endocrinology. He has more than 35 years of clinical and research experience, including Interim CEO at Antigen Express, Inc.; Director and Senior Scientific Advisor of Generex Biotechnology Corporation; CEO and President of Symcopeia Company; Clinical Associate Professor of Medicine at Indiana University School of Medicine; and Senior Medical Director for Diabetes and Cardiometabolic Medicine at Eli Lilly and Company. Fellowships include the American College of Endocrinology and the Faculty of Pharmaceutical Medicine of the Royal Colleges of Physicians (U.K.). Dr. Anderson has degrees from Louisiana State University School of Medicine, New Orleans, and Centenary College of Louisiana. 

Laurie Ellenberger Sr. Vice President, Finance, Accounting, & IT

Laurie Ellenberger – Sr.Vice President,  Finance, Accounting & IT

Mrs. Ellenberger joined PTS Diagnostics in May 2015 and was appointed to her current role in March 2018. She leads the Finance and Accounting team as well as Payroll and Benefits plus oversees the Customer Resource Management (CRM) system. She has more than 25 years of experience in a variety of finance roles, including forays in manufacturing, banking, insurance, retail, and distribution. Her career began as an auditor with Coopers & Lybrand and then progressed into management roles with Levy Home Entertainment, a division of the Charles Levy Company, Norwood Promotional Products, BIC and eventually, hhgregg, where she was instrumental in developing strategies to create an environment of effective compliance standards and sound financial practices. Mrs. Ellenberger holds a Bachelor of Science in Accountancy, cum laude, from DePaul University and is a Certified Public Accountant, registered in both Illinois and Indiana.